Question: Who is the chairperson of Justin Trudeau's political party?
Paraphrase: Who is the chairperson of Justin Trudeau's political party?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P488 wd:Q3099714 . ?sbj wdt:P31 wd:Q7278 } 
Answer: Liberal Party of Canada